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Follow these six easy steps to address common installation and operation problems

    Air-operated double-diaphragm pumps (AODD) are preferred in transfer applications because their simple design makes them easy to operate and cost-effective to repair. To achieve top performance, end users must install and operate these pumps correctly. In a matter of minutes, common issues can be corrected with the right information.

    Here are six quick steps that can help you fix common problems during installation and operation.


Image 1. Chemical transfer with air-operated double-diaphragm pumps (Images and graphics courtesy of Graco Inc.

1. Check the inlet air line size and pressure.
Installing an air line that is too small is the most common mistake users make when installing an AODD pump. Using too small of an air line will starve the pump of the fuel—compressed air—it needs to operate at peak performance. Upgrading to a larger air line is an easy fix that takes a few minutes.

Double-diaphragm pumps come in all shapes and sizes, based on the application and fluid requirements. Larger AODD pumps (1-inch and greater) require more compressed air and larger air lines than smaller pumps to operate at full capacity.

The appropriate air line size for a pump is located in the manufacturer’s installation and operation manual. As a general guideline for AODD inlet air line sizes, match the air line hose size to the air inlet port size on the
air valve.

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Credit by Michael Sandlin

https://www.pumpsandsystems.com/pumps/october-2016-5-minute-fix-troubleshoot-diaphragm-pump